I didn't like high-school so much for meeting new friends. Don't get me wrong, I met dozens of new people on a daily basis, but interaction was always really short. We had 7 minute recesses, a 25 minute lunch, and a 7 minute clear-out policy at the end of the day.
Most of the girls I dated in high school were either a) introduced by a mutual friend as a blind/arranged date or b) picked up at an after-class activity.
So I suggest you join a few extra-curricular activities at your school or go to wherever the other teens hang out and hang out.

Your parents (directly or through taxes) are paying large amounts of money to trap you for many hours every weekday in a small building with hundreds or thousands of girls your age.
I don't think you could ask for a better opportunity than this.